双层泡沫铝夹芯板抗滚石冲击结构性能优化研究

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振动与冲击 ›› 2018, Vol. 37 ›› Issue (5) : 85-91.

论文

程鹏1，李伟2，翟敏刚3，王东坡4

作者信息 +

Structure performance optimization of double-layer aluminum foam sandwich panels under rockfalls impact

CHEN Peng1, LI Wei2, ZHAI Min-gang3 WANG Dong-po4

Author information +

文章历史 +

摘要

在山区桥墩抗滚石冲击领域中，防护结构优良的耗能性能是保证桥墩安全稳定的关键。为此，引入泡沫铝夹芯结构，通过MTS压缩试验与动力有限元分析芯体厚度变化对夹芯板耗能性能的影响。结果表明：相比于单层泡沫铝夹芯板，相同压载条件下双层泡沫铝夹芯板具有更优良的耗能能力；对于双层泡沫铝夹芯板，一定程度上增大上下层泡沫铝芯体厚度均可有效提升夹芯板耗能性能，然而，当芯体厚度增大到一定值时，夹芯板耗能性能不再显著提升；双层泡沫铝夹芯板上下层厚度的最优化比例示不同考虑因素而定。上述研究成果已应用于S303映—卧公路青岗坪渔子溪大桥桥墩，防护效果显著。

Abstract

Excellent energy-absorption property of aluminum foam sandwich (AFS) structure is the crucial to ensure the safety and stability of bridge piers against rockfalls in mountainous areas. In order to analyze the effect of AF core thickness on energy-absorption performance of AFS panels, laboratory compression tests and dynamic finite element analysis were performed. The results showed that a double-layer AFS panel has a better energy absorption performance than a single-layer AFS one does under the same loading condition; for double-layer AFS panels, increasing the upper layer or/and the lower layer AF core thickness can effectively improve their energy absorption performance; the performance is no longer significant when core thickness increases to a certain threshold; an optimized proportion of AF core thickness is Tupper:Tlower = 3:2. The study results were applied to the demonstration project of YU Zixi bridge piers, the protection effect was remarkable.

导出引用

程鹏1，李伟2，翟敏刚3，王东坡4. 双层泡沫铝夹芯板抗滚石冲击结构性能优化研究[J]. 振动与冲击, 2018, 37(5): 85-91

CHEN Peng1, LI Wei2, ZHAI Min-gang3 WANG Dong-po4. Structure performance optimization of double-layer aluminum foam sandwich panels under rockfalls impact[J]. Journal of Vibration and Shock, 2018, 37(5): 85-91

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